Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Different Tilting Pad Bearing Configurations
Joint Authors
He, Feng
Allaire, Paul
Wang, Weimin
Li, Qihang
Source
International Journal of Rotating Machinery
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-13
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Rotordynamic stability is crucial for high performance centrifugal compressors.
In this paper, the weighted instrumental variable (WIV) based system identification method for rotating machinery stability is investigated based on a sine sweep forward excitation with an electromagnetic actuator.
The traditional multiple input multiple output (MIMO) frequency response function (FRF) is transformed into a directional frequency response function (dFRF).
The rational polynomial method (RPM) combined with WIV is developed to identify the rotor’s first forward mode parameters.
This new approach is called the COMDYN method.
Experimental work using the COMDYN method is carried out under different rotating speeds, oil inlet temperatures, and pressure conditions.
Two sets of bearings with preloads 0.1 and 0.3 are investigated.
A numerical rotor-bearing model is also built.
The numerical results correlate reasonably well with the experimental results.
The investigation results indicate that the new method satisfies the desired features of rotating machine stability identification.
Furthermore, the system log decrement was improved somewhat with the increase of oil inlet temperature.
The increase of oil supply pressure affects the rotor-bearing system stability very slightly.
The results of this paper provide new and useful insights for potentially avoiding instability faults in centrifugal compressors.
American Psychological Association (APA)
Wang, Weimin& Li, Qihang& He, Feng& Allaire, Paul. 2014. Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Different Tilting Pad Bearing Configurations. International Journal of Rotating Machinery،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-491488
Modern Language Association (MLA)
Wang, Weimin…[et al.]. Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Different Tilting Pad Bearing Configurations. International Journal of Rotating Machinery No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-491488
American Medical Association (AMA)
Wang, Weimin& Li, Qihang& He, Feng& Allaire, Paul. Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Different Tilting Pad Bearing Configurations. International Journal of Rotating Machinery. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-491488
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-491488